package com.neuedu.corejava.ch9;

import java.util.Scanner;

public class TestString {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		StringBuffer stringBuffer = new StringBuffer();
		stringBuffer.append(sc.next());
		if (stringBuffer.length() == 11) {
			stringBuffer.replace(3, 7, "****");
			System.out.println(stringBuffer);
		}else {
			System.out.println("输入错误");
		}
		

	}

}
